Rockwell Automation Publication 7000-UM202H-EN-P - November 2023 15
Chapter 1 PowerFlex 7000 Drive Overview
Figure 2 - 3300/4160V Direct-to-Drive (Transformerless AFE Rectifier)
AFE Rectifier with Separate Isolation Transformer
For applications when the line voltage is higher than the motor voltage, a
transformer is required for voltage matching. In this case, providing an AFE
rectifier with a separate isolation transformer is ideal (indoor and outdoor
transformer versions are offered). The isolation transformer replaces the
requirement for an integral line reactor and replaces the requirement for a
CMC that is supplied in the Direct-to-Drive rectifier configuration. However,
the AFE rectifier, its operation, and advantages are the same as the Direct-to-
Drive configuration.
Figure 3 - 3300/4160 AFE Rectifier with Separate Isolation Transformer
SGCTs
LINE CONVERTER
OMMON MODE CHOKE
C
L+
M+
SGCTs
MACHINE CONVERTER
U(T1)
V(T2)
W(T3)
L-
M-
LR
SGCTs
LINE CONVERTER DC LINK
L+
M+
SGCTs
MACHINE CONVERTER
U(T1)
V (T2)
W(T3)
L-
M-
2U (X1)
2V (X2)
2W (X3)
1U
1V
1W
ISTXISTX
REMOTE
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